The Classic ‘Five Pirates’ Puzzle

Today’s puzzle is a classic. I don’t know who originally created it, however, it has a neat solution. Five pirates discover 100 gold coins. They are ranked by seniority, from oldest to youngest: Pirate A, Pirate B, Pirate C, Pirate D, and Pirate E. The most senior pirate, Pirate A, proposes how to divide the …